Novel sealing groove structure

Abstract

The novel sealing groove structure comprises a gear box and a box cover connected with the gear box, a groove is formed in the gear box, an O-shaped sealing ring is installed in the groove to achieve sealing of the gear box and the box cover, and a boss strip is arranged at the bottom of the groove. According to the novel sealing groove structure provided by the invention, the boss strip is arranged at the bottom of the groove of the gear box, so that the situation that the effective installation of an O-shaped sealing ring is affected by succulents or particles generated by erosion of different degrees at a normal crack position due to erosion of feed ports on the two sides of the sealing groove over against the bottom of the sealing groove during actual die-casting production is avoided, and the service life of the O-shaped sealing ring is prolonged. And product function failure is caused. Meanwhile, through the arrangement of the boss strip in the groove, when the O-shaped sealing ring is installed in the gear box and the box cover, the contact area of the O-shaped sealing ring and the sealing groove can be increased, the better sealing effect is achieved, and the oil leakage problem is effectively solved. Not only is the die-casting reject ratio effectively reduced, but also the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the field of sealing grooves, in particular to a novel sealing groove structure. Background Art

[0002] Power tools are handheld or portable mechanized tools that are powered by electric motors or electromagnets and drive the working head through a transmission structure. During the operation of power tools, the operating accuracy is largely determined by the matching accuracy of various components. The gear box and the box cover are connected by installing a sealing ring to preserve and use the lubricating oil in the box, prevent oil leakage, and ensure the normal use of the tool. Generally, the bottom of the sealing groove of this type of gear box is designed to be flat, and a commonly used O-ring is used to achieve sealing.

[0003] In the process of implementing the prior art, the inventor discovered that:

[0004] Gearboxes are generally produced by aluminum alloy die-casting. Due to the problems of casting structure and aging of die-casting molds, the bottom of the gearbox sealing groove is prone to erosion and cracking in different degrees in the corresponding mold parts in the sealing groove during actual die-casting production. This causes the feed ports on both sides of the sealing groove to erode the bottom of the sealing groove during actual die-casting production, causing erosion and cracking positions of the corresponding mold at the bottom of the groove to produce different degrees of erosion and particles, which cannot be effectively removed by subsequent general auxiliary processes. During the installation and use of the O-ring, the O-ring will be arched by sharp particles or particles, or the O-ring will be damaged by sharp particles and break, affecting the effective installation of the O-ring. That is, the O-ring cannot effectively fit with the sealing groove, resulting in failure of the sealing function, and ultimately causing the gearbox to leak oil and cannot be used normally.

[0005] Therefore, it is necessary to provide a technical solution to reduce the erosion of different degrees at the bottom of the sealing groove during die-casting production, which may produce flesh or particles, affect the effective installation of the O-ring, and cause product failure. Summary of the invention

[0006] The embodiment of the present application provides a technical solution for reducing the erosion of different degrees at the bottom of the sealing groove during die-casting production, thereby generating flesh or particles, affecting the effective installation of the O-ring and causing product function failure.

[0007] Specifically, a new sealing groove structure includes a gear box and a box cover connected to the gear box. The gear box is provided with a groove for installing an O-ring to achieve sealing between the gear box and the box cover. A boss strip is provided at the bottom of the groove.

[0008] Furthermore, the boss strip is located at the center of the bottom of the groove.

[0009] Furthermore, the ratio of the width of the boss strip to the width of the bottom of the groove is between 1:5 and 1:3.

[0010] Furthermore, the ratio of the height of the boss strip to the depth of the groove is between 1:5 and 1:3.

[0011] Furthermore, the boss strip is a continuous boss strip.

[0012] Furthermore, the edges of the end surfaces of the boss strips away from the bottom of the groove are all rounded.

[0013] The technical solution provided in the embodiments of the present application has at least the following beneficial effects:

[0014] The present application provides a novel sealing groove structure, which, by setting a boss bar at the bottom of the gearbox groove, avoids the feed ports on both sides of the sealing groove from scouring the bottom of the sealing groove during actual die-casting production, causing erosion of the mold corresponding to the bottom of the groove, and erosion of different degrees at the crack position to produce fleshy or particles. In the subsequent installation and use of the O-ring, the O-ring will be arched or damaged by the sharp fleshy or particles, causing the O-ring to break, affecting the effective installation of the O-ring and causing the product to fail. At the same time, by setting the boss bar in the groove, the O-ring can increase the contact area between the O-ring and the sealing groove when it is installed in the gearbox and the box cover, thereby obtaining a better sealing effect and effectively solving the oil leakage problem. It not only effectively reduces the die-casting defective rate, but also ensures product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A schematic diagram of the structure in which the improved front gearbox and the box cover are connected via an O-ring provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the structure of a gearbox provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure in which the improved gear box and the box cover are connected via an O-ring according to an embodiment of the present application;

[0019] Reference numerals:

[0020] A new type of sealing groove structure-100;

[0021] Gear box-1; groove-11; boss strip-112; box cover-2; O-ring-3. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0023] Please refer to Figure 1 , which is a schematic diagram of the structure in which the gear box 1 and the box cover 2 are connected by an O-ring 3 before improvement. The bottom of the sealing groove of the gear box 1 is designed to be flat, and a commonly used O-ring 3 is used to achieve sealing. However, it should be taken into account that in the actual aluminum alloy die-casting production, due to the casting structure and the aging of the die-casting mold, the corresponding mold part in the sealing groove is prone to erosion and cracking to varying degrees, resulting in the formation of meat or particles there. During the installation and use of the O-ring 3, the O-ring will be arched by sharp meat or particles, or the O-ring will be damaged by sharp meat or particles and break, making it impossible for the O-ring 3 to effectively fit with the sealing groove, resulting in the failure of the sealing function, and ultimately causing the gear box 1 to leak oil and cannot be used normally.

[0024] Please refer to Figure 2 and Figure 3 , which is a schematic diagram of the structure in which the gearbox 1 and the cover 2 are connected by an O-ring 3 after improvement. A novel sealing groove structure 100 is provided, comprising a gearbox 1 and a cover 2 connected to the gearbox 1. A groove 11 is provided in the gearbox 1, and the O-ring 3 is installed in the groove 11 to achieve sealing between the gearbox 1 and the cover 2. A boss strip 112 is provided at the bottom of the groove 11.

[0025] Specifically, by designing a boss strip 112 at the bottom of the groove 11, the sealing groove is prevented from being eroded directly against the bottom of the sealing groove during actual die-casting production, causing different degrees of erosion at the bottom of the groove to produce flesh or particles, affecting the effective installation of the O-ring 3.

[0026] Furthermore, the boss bar 112 is located at the center of the bottom of the groove. Specifically, the boss bar 112 can also be installed at a non-center position at the bottom of the groove. It is understandable that the installation at the center or non-center position of the bottom of the groove is to ensure the subsequent sealing effect with the O-ring 3. In order to ensure the uniformity of the force of the O-ring 3, the present application preferably locates the boss bar 112 at the center of the bottom of the groove.

[0027] Furthermore, the ratio of the width of the boss strip 112 to the width of the bottom of the groove 11 is between 1:5 and 1:3. The ratio of the height of the boss strip 112 to the depth of the groove 11 is between 1:5 and 1:3. Specifically, the settings of the width and height of the boss strip 112 are related to the height and width of the groove 11, which can be understood as facilitating the subsequent installation of the O-ring 3 to have more contact area with the groove 11, thereby ensuring the sealing effect of the sealing ring. In a preferred embodiment provided in the present application, the preferred width ratio is 1:3 and the height ratio is 1:4. Specifically, in the present application, the width of the groove in the gear box is preferably 5 mm.

[0028] Further, the boss strip 112 is a continuous boss strip 112. Specifically, the boss strip 112 can be a continuous boss strip 112 arranged according to the shape of the groove 11. It can be understood that the arrangement of the boss strip 112 can ensure that the contact area between the O-ring 3 and the groove 11 is increased, thereby increasing the sealing effect.

[0029] Furthermore, the edges of the end faces of the boss strip 112 away from the bottom of the groove 11 are all rounded. It can be understood that in order to avoid damage to the O-ring 3 after subsequent installation, the O-ring 3 can be avoided to a certain extent by rounding.

[0030] It should be pointed out that the present application is mainly used for the gear box 1 in the process of casting the groove 11 for installing the O-ring 3. Due to the easy occurrence of different degrees of erosion and cracking in the mold part, the gear box 1 groove 11 has a phenomenon of flesh or particles inside, which causes the O-ring 3 to be arched or damaged by the flesh or particles when the O-ring 3 is installed in the groove, resulting in the technical problem that the O-ring 3 cannot be effectively fitted with the groove 11. Therefore, the present application sets a continuous boss strip 112 at the bottom of the groove 11 to avoid the feed ports on both sides of the sealing groove from eroding the bottom of the sealing groove during actual die-casting production, resulting in different degrees of erosion at the corresponding mold erosion and cracking positions at the bottom of the groove to produce flesh or particles, affecting the effective installation of the O-ring 3 and causing product failure. At the same time, by setting the boss strip 112 in the groove 11, the O-ring 3 can increase the contact area with the groove when it is installed in the gear box 1 and the box cover 2, thereby obtaining a better sealing effect and effectively solving the oil leakage problem.

[0031] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the existence of other identical elements in the process, method, commodity or device including the element.

[0032] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A novel sealing groove structure, comprising a gear box and a box cover connected to the gear box, wherein a groove is provided in the gear box, and an O-ring is installed in the groove to achieve sealing between the gear box and the box cover, and the characteristics are: A boss strip is arranged at the bottom of the groove.

2. The novel sealing groove structure according to claim 1 is characterized in that: The boss strip is located at the center of the bottom of the groove.

3. The novel sealing groove structure according to claim 1 is characterized in that: The ratio of the width of the boss strip to the width of the groove bottom is between 1:5 and 1:

3.

4. The novel sealing groove structure according to claim 1 is characterized in that: The ratio of the height of the boss strip to the depth of the groove is between 1:5 and 1:

3.

5. The novel sealing groove structure according to claim 1 is characterized in that: The boss strip is a continuous boss strip.

6. The novel sealing groove structure according to claim 1 is characterized in that: The edges of the end surfaces of the boss strips away from the bottom of the groove are all rounded.

Images